When I try to install mysql-server, an error comes like:
dpkg: error processing package mysql-server (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
mysql-server-5.7
mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
What does it mean. Any ideas?
dpkg returning an error code 1 doesn't mean anything specific but it usually has to do with dependency issues. In your case, you tried to install two versions/instances of the same package i.e. mysql-server and mysql-server-5.7. So do the following to remove any redundant dependency issues and install a functioning mysql package
sudo apt-get clean
sudo apt-get purge mysql*
sudo apt-get update
sudo apt-get install -f
sudo apt-get install mysql-server-5.7
sudo apt-get dist-upgrade
this should fix the problem at hand. But in the future, have care about the package names you add after sudo apt-get install since the wrong list of package names - for example redundant entries in the list - results in failure to install either of the packages or worse - you might even find yourself wading through the hellish depths of #DEPENDENCY-HELL
All of the answers I've been able to find for this question have been of the form "purge your Mysql install and re-install it." But in my case, I already have a working/active Mysql install. For me, the reason why dpkg --configure -a fails is because Mysql is already installed. Why dpkg thinks that the postinstall script needs to be run for my already-installed-and-upgraded Mysql I may never know, but it does.
After considerable time scouring for answers, I found a solution that should work if there are others who already have a working Mysql 5.7 and just want to get past this bogus postinstall script. You can edit the postinstall script directly as (on Ubuntu):
sudo vi /var/lib/dpkg/info/mysql-server-5.7.postinst
And then, on the second line, just add exit 0 and then run dpkg again and you should get something like:
$ sudo dpkg --configure -a
Setting up mysql-server-5.7 (5.7.28-0ubuntu0.18.04.4) ...
You definitely would not want to follow these instructions if your Mysql installation had not previously completed (there's a reason that the postinstall script insists on running). But for those who might end up with dpkg in a wonky state, as I have, the above can save you a lot of time purging and reinstalling an already-working version of Mysql.
This should help
sudo apt-get purge mysql*
sudo apt-get autoremove
sudo apt-get autoclean
sudo apt-get dist-upgrade
And now reinstall mysql
sudo apt-get install mysql-server
If you're on a VPS or similar, your error may be due to lack of RAM.
Running apt-upgrade seems to require some RAM, so it may force-close mysql, hence the problem to recover from the error.
Try:
1) Stop mysql manually before any apt-upgrade
sudo /etc/init.d/mysql stop
2) Fix:
sudo dpkg --configure mysql-server-X.X
(if version not known, use just mysql-server to find out (will not fix error)
3) Check:
sudo apt-get upgrade
Start mysql manually if it wasn't started by apt.
My answer from askubuntu.
kill the musql deamon and purging helps
sudo pkill mysqld # kill
sudo apt-get purge mysql-server-5.7 # Or whatever you are trying to purge.
Thanks, @endrias for the suggestion.
None of the apt methods worked for me, try this:
Find locking process
$ ps -eaf
root 7316 1 0 00:19 ? 00:00:00 /usr/bin/dpkg --status-fd 35 --configure --pending
root 7808 7316 0 00:19 ? 00:00:00 /usr/bin/perl -w /usr/share/debconf/frontend /var/lib/dpkg/info/mysql-se
root 7817 7808 0 00:19 ? 00:00:00 /bin/bash /var/lib/dpkg/info/mysql-server-5.7.postinst configure
mysql 7973 7817 0 00:20 ? 00:00:00 mysqld --user=mysql --init-file=/var/lib/mysql-files/tmp.iNyY06ty0K --so
Kill it
do sudo kill -9 7973, basically the mysql one.
Now purge
sudo apt-get purge mysql-server-5.7 # Or whatever you are trying to purge.
I had a similar issue. This is how I fixed mine.
sudo service mysql restartsudo apt install -f
i face same error due to problem in my upgrade from ubuntu 18.04 to ubuntu 20.04 , what i did is get mariadb instead also make sure when you do pruge mysql that if asked you to remove dbs in the dir tell it not to delete the dbs so you will have your old databases with no data loss
what i did was this cmds
sudo apt-get purge mysql*
sudo apt-get autoremove
sudo apt-get autoclean
sudo apt-get dist-upgrade
sudo apt-get install mariadb-server
I tried almost every possible way but nothing was working for me. Then I found the problem that I was facing was due to less available ram. You can check your current ram status by free -h (in my case available was less than 1 GB). To clear ram restart your device. Then type following commands
sudo apt-get purge mysql*
sudo apt-get autoremove
sudo apt-get autoclean
sudo apt-get dist-upgrade
then again install mysql-server by
sudo apt-get install mysql-server
try this solution using aptitude this will replace all the file corrupted.
This is work on my 18.04
In my case I had to run:
systemctl stop mysql.service
to stop MySQL before being able to install mysql without errors using:
sudo apt-get install mysql-server
To solve the dependency issue, try:
sudo apt-get purge
sudo apt-get clean
sudo apt-get check
And reinstall the package again by: sudo apt-get install mysql-server.
Source: Thread: Dpkg: Dependency problems - leaving unconfigured.
Other commands to try:
sudo apt-get install -f
sudo apt-get autoremove
sudo dpkg --configure -a
Related: How can I Resolve dpkg dependency? at Ask Ubuntu.
The problem can be much simpler (in my case) I had a missconfigured value in my configuration file [my.cnf] which lead to the error. After cleaning up my.cnf mysql-server was restarted successfully
Also pay attention to the terminal you are using, if it is ZSH many uninstall commands will not work like: sudo apt-get purge mysql* and the reinstallation process will fail, to fix this it is simple type in your terminal the word bash so that the terminal used is Bash, run the sudo apt-get purge mysql* command again and also the following commands below to confirm that you removed everything.
sudo apt-get remove mysql-server mysql-client mysql-common
sudo apt-get autoremove
sudo apt-get autoclean
sudo rm -rf /var/lib/mysql
sudo rm -rf /etc/mysql
Finally, run mysql --version to make sure there is no version on your machine and you can try installing again.
I came across the yes Unix binary, which is incredibly stupid: it just endlessly types y (try it, you can just run yes in your terminal)
so the following just works (I used this in a dockerfile)
yes | apt-get install mysql-community-server
I had another mysql process running in background. (ckeck if your lampp mysql server is on, Then turn it off.) then try sudo apt dist-upgrade
if lammp mysql is not working then, check this command, ps -eaf and then look for mysql process and kill it by it's port number sudo kill -9
